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Question: CH3Br + Nu–\(\longrightarrow\)CH3 – Nu + Br– The decreasing order of the rate of the above reaction...

CH3Br + Nu–⟶\longrightarrowCH3 – Nu + Br–

The decreasing order of the rate of the above reaction with nucleophiles (Nu**¯**) A to D is :

A

D > C > B > A

B

A > B > C > D

C

B > D > C > A

D

D > C > A > B

Answer

D > C > A > B

Explanation

Solution

Since this reaction will follow SN2 pathway so stronger the base better its nucleophilicity. The correct order of nucleophiles would be :

CH3O−>OH−>PhO−>AcO−\mathrm { CH } _ { 3 } \mathrm { O } ^ { - } > \mathrm { OH } ^ { - } > \mathrm { PhO } ^ { - } > \mathrm { AcO } ^ { - }